Compression Results

[Mattw_83]

Start car, better with a mate, so he can blip the throttle.

Take your oil filler cap off and see if it is breathing heaps = indicates blowby = rings/liners worn. Keep a rag handy,so you can half cover the hole just in case it starts to spit oil.

Do it with a couple of cars if you can so you can see the difference.

And by breathing ill audibly hear air in the system? or it will blow oil around?

Ill give it a crack.

Edited April 16, 2011 by Mattw_83

[joeyjoejoejuniorshabadoo]

were the 2 test's done on seperate kits?

when i sold my 4age we tested it and got 180 +-5 across all 4, but with another guage we got 160 +-5

[Mattw_83]

Apparently grabbed another gauge for the second test. I'm getting further tests out of curiosity. Leak down etc. And as previously mentioned.

If no good... Say hello fg xr6t. It's s bit of boat... But NEW

[Trozzle]

Not to say your mechanic is bad or anything, but I'd very much recommend getting the next test carried out at a different workshop just to rule out the chance that he might be doing something wrong.

[Mattw_83]

I agree. I will be. Im no mechanic mate, but of all tasks how complicated is a compression test. Remove components, put the gauge in and kick it over. repeat. How many variables for f**k ups can there be.

But yeah I'll be doing it anyway

[battery]

sounds fine to me mate my first rb20 had a little lower readings then yours and it lasted 80000ks (total 190000 on odo) before the head gasket gave up... I ran shitty oil, water in the radiator and limiter bashed it cold

[BoostdR]

Aftermarket cams and adjustable cam wheels will effect your readings.

[snozzle]

unless its a forged motor i doubt the fact that its cold has anything to do with the low readings, my engines compression when cold is 155psi and 170 when hot

[Mattw_83]

Aftermarket cams and adjustable cam wheels will effect your readings.

Nah its virtually a stock car. Just the standard stuff. Exhaust, FMIC, Nistune etc,

[tridentt150v]

I agree. I will be. Im no mechanic mate, but of all tasks how complicated is a compression test. Remove components, put the gauge in and kick it over. repeat. How many variables for f**k ups can there be.

But yeah I'll be doing it anyway

At WOT?

[Mattw_83]

At WOT?

I can only assume. This is the general practice yeah? Ill ask specifics this arvo.

There just isnt anything from the factory that has the same appeal. Closest is a turbo falcon. But it honestly feels like your driving a bus in comparison. Plenty of poke though out of the box ill give it that.

[SiR_RB]

before i bought my r32 gtr, i compression tested afew that realy appealed to me.

i took them for a nice drive to get the engine hot, then did the compression test at WOT

my gtr came up 160 - 162psi accross each pot...

different methods will get different results

[3LGODZILA]

yeah do the test at running temp for starters, and full throttle, keep the test consistent across the cylinders for example if u hit 3 compression strokes on the 1st cylinder, do the same for the other 5, dont just keep cranking until it stops going up. if your still not sure do a leakdown test it will tell you everything a compression test doesn't.

[Mattw_83]

Any recommendations for a reliable competent engine rebuild(er) in Sydney I could contact?

[Mattw_83]

Falcons a boat, ss is a slug and boring as bat shit

[tridentt150v]

You need to talk to somebody at Unigroup, they have a very good rep and will be able to help.

[Mattw_83]

Seems to know his stuff.

Booked in for next week.

[DVS JEZ]

Falcons a boat, ss is a slug and boring as bat shit

I watched an xr6 turbo lay 3rds up the street past where i was working today. Did it very easily.

Still a ford though

[Mattw_83]

yeah test drove one and gave it heaps. Manual fg. Goes great. Sounds good too. I was well impressed, but that feeling faded fast when I got back into the old skyline and realised I still f**king preferred it. Makes parting with the 50k painful.

Be nice if those clowns at Nissan released something comparable...

[3LGODZILA]

yeah test drove one and gave it heaps. Manual fg. Goes great. Sounds good too. I was well impressed, but that feeling faded fast when I got back into the old skyline and realised I still f**king preferred it. Makes parting with the 50k painful.

Be nice if those clowns at Nissan released something comparable...

a skyline is a performance car an xr6 turbo is just a family car with a turbo slapped on